An ancient class of echinoderms whose members are suspension feeders with long, feathery arms is called:
A) Asteroidea.
B) Crinoidea.
C) Ophiuroidea.
D) Echinoidea.
E) Holothuroidea.

Question

Quizplus · Accepted Answer

The description matches that of the Crinoidea, also known as sea lilies and feather stars. They have long, branched arms which they use to capture food particles from the water column. Asteroidea (sea stars), Ophiuroidea (brittle stars), Echinoidea (sea urchins) and Holothuroidea (sea cucumbers) have different body structures and feeding methods.

An Ancient Class of Echinoderms Whose Members Are Suspension Feeders